This is a picture of the inner tag of the jacket taken from a past rakuten listing.
As you can see it says WF-C039. Another member that has the jacket has confirmed that their one also says this.

The jacket on ebay, however, says WF-C801 on its inner tag. Is this difference an indication of anything? The seller has taken more detailed photos and everything about the jacket apart from this inner tag detail and the white label seems right. Thanks for the help.

Still find it unusual. I only ever saw one other fishtail being sold with a white label from about two years ago. Other than that, all other ones I've seen sold in the secondary market internationally and in Japan have the regular blue label. Jacket seems real enough but still no explanation for this difference.